A weak upper level low pressure area over Western Cuba caused tropical moisture and instability to flow across South Florida. This produced scattered afternoon and early evening thunderstorms across portions of the area.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS MFL wrote it up.
A weak upper level low pressure area over Western Cuba caused tropical moisture and instability to flow across South Florida. This produced scattered afternoon and early evening thunderstorms across portions of the area.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Miami, FL wrote its last area forecast discussion before the first event at Jul 30, 5:01 PM EST, 19 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MIAMI FL 601 PM EDT MON JUL 30 2012 .UPDATE...RAISED POPS ACROSS INTERIOR PORTIONS THROUGH 00Z TO ACCOUNT FOR ONGOING CONVECTION WHICH WILL LIKELY REMAIN SCATTERED TO NUMEROUS OVER THE NEXT COUPLE OF HOURS. && .PREV DISCUSSION... /ISSUED 517 PM EDT MON JUL 30 2012/ AVIATION...A WEAK HIGH PRESSURE RIDGE WILL BE OVER S FLA THROUGH THE PERIOD, ALOFT AND TO THE SW OF THE AREA...AN UPPER LEVEL LOW WILL PULL SOME MOISTURE OVER S FLA. VCSH POSSIBLE MIAMI DADE AND BROWARD TERMINALS OVER NITE WITH VCTS FROM 15Z-18Z AS TSTMS DEVELOP ALONG THE E COAST SEA BREEZE BUT MOVE WESTWARD INLAND. AT THIS TIME KPBI MAY HAVE NO CONVECTIVE ACTIVITY. SURFACE WINDS SE-SSE 8 TO 12 KTS DECREASING AFT 00Z TO CALM OR LIGHT SE. AFTER 15Z BECOMING SE 10 KTS. AT KAPF...VCSH UNTIL 02Z THEN VFR WITH CALM WINDS. AFT 13Z SE WINDS < 8 KTS BECOMING AFT 17Z SW AROUND 10 KTS AS W COAST SEA BREEZE DVLPS. VCTS AFT 20Z- 24Z. PREV DISCUSSION... /ISSUED 215 PM EDT MON JUL 30 2012/ SHORT TERM...TONIGHT THROUGH THURSDAY...TUTT LOW OVER WESTERN CUBA SHOULD CONTINUE TO MOVE SLOWLY SOUTHWESTWARD. WATER VAPOR IMAGES SHOWS MOISTURE ALOFT WRAPPING AROUND THIS LOW AND BEING ADVECTED OVER SOUTH FLORIDA. THIS WILL CONTINUE TO LEAD TO THE DEVELOPMENT OF DAILY SHOWERS/TSTMS ACROSS THE LOCAL AREA. LOCATION WILL LARGELY DEPEND ON LOCAL SEA/LAKE BREEZES, BUT A MOSTLY EASTERLY STEERING FLOW WILL TEND TO KEEP MOST ACTIVITY INLAND AND WEST DURING THE AFTERNOON AND OVER EASTERN AREAS NIGHTTIME AND EARLY MORNINGS. A MID LATITUDE TROUGH IS EXPECTED TO BUILD SOUTHWARD ACROSS SE U.S. AND THIS WILL RESULT IN A MORE WEST-SOUTHWEST DEEP LAYER FLOW BY WEDNESDAY, AND ALTHOUGH A DECREASE IN AVAILABLE MOISTURE IS EXPECTED, ANY SHOWER/STORM THAT DEVELOPS WILL LIKELY BE STEERED TOWARD THE EASTERN METRO AREAS. LONG TERM...FRIDAY THROUGH MONDAY...AN ATLANTIC HIGH PRESSURE RIDGE IS EXPECTED TO BUILD WESTWARD ACROSS THE REGION WITH A DEEP LAYER EASTERLY FLOW RETURNING TO THE LOCAL AREA. WITH DEEPER MOISTURE OVER THE REGION...A RETURN TO AFTERNOON SHWRS/STORM OVER INTERIOR/WEST AND NIGHTTIME/EARLY MORNING SHOWERS OVER EASTERN AREAS SHOULD BE EXPECTED. MARINE...PLEASANT WEATHER CONDITIONS SHOULD PREVAIL THROUGH THE REST OF THE WEEK WITH SFC WINDS AOB 15 KTS AND SEAS AOB 2 FEET. FIRE WEATHER...NO CONCERNS AT THIS TIME. && .PRELIMINARY POINT TEMPS/POPS... WEST PALM BEACH 77 89 76 90 / 10 20 10 30 FORT LAUDERDALE 78 90 78 90 / 10 20 10 30 MIAMI 78 91 78 91 / 10 20 10 30 NAPLES 78 91 78 92 / 20 20 10 20 && .MFL WATCHES/WARNINGS/ADVISORIES... FL...NONE. AM...NONE. GM...NONE. &&
HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA NATIONAL WEATHER SERVICE MIAMI FL 616 PM EDT MON JUL 30 2012 AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676- 311330- LAKE OKEECHOBEE-BISCAYNE BAY- COASTAL WATERS FROM JUPITER INLET TO DEERFIELD BEACH, FL OUT 20 NM- COASTAL WATERS FROM DEERFIELD BEACH TO OCEAN REEF, FL OUT 20 NM- WATERS FROM JUPITER INLET TO DEERFIELD BEACH, FL EXTENDING FROM 20 NM TO 60 NM- WATERS FROM DEERFIELD BEACH TO OCEAN REEF, FL EXTENDING FROM 20 NM TO THE TERRITORIAL WATERS OF THE BAHAMAS-GLADES-HENDRY- INLAND PALM BEACH-METRO PALM BEACH-COASTAL COLLIER-INLAND COLLIER- INLAND BROWARD-METRO BROWARD-INLAND MIAMI DADE-METRO MIAMI DADE- MAINLAND MONROE-COASTAL PALM BEACH-COASTAL BROWARD- COASTAL MIAMI DADE-FAR SOUTH MIAMI DADE- COASTAL WATERS FROM CHOKOLOSKEE TO BONITA BEACH, FL OUT 20 NM- COASTAL WATERS FROM EAST CAPE SABLE TO CHOKOLOSKEE, FL OUT 20 NM- GULF WATERS FROM CHOKOLOSKEE TO BONITA BEACH, FL EXTENDING FROM 20 TO 60 NM- 616 PM EDT MON JUL 30 2012 ...ISOLATED STRONG TO SEVERE THUNDERSTORMS EARLY THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA. .DAY ONE...TONIGHT THUNDERSTORMS: SCATTERED THUNDERSTORMS ARE POSSIBLE THROUGH EARLY EVENING ACROSS THE INLAND LOCATIONS. A FEW STORMS MAY CONTAIN FREQUENT TO EXCESSIVE LIGHTNING STRIKES, GUSTY WINDS AROUND 60 MPH, AND HAIL. WIND: THE STRONGEST STORMS MAY PRODUCE WIND GUSTS AROUND 60 MPH EARLY THIS EVENING. HAIL: HAIL TO THE SIZE OF QUARTERS MAY OCCUR WITH A FEW OF THE STRONGEST THUNDERSTORMS EARLY THIS EVENING. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY HEAT INDEX VALUES AROUND 105 DEGREES ARE POSSIBLE EACH DAY, ESPECIALLY ACROSS INTERIOR PORTIONS OF THE REGION DURING THE AFTERNOON HOURS. SCATTERED THUNDERSTORMS ARE POSSIBLE EACH DAY INTO THE UPCOMING WEEKEND. THE STRONGEST STORMS WILL BE CAPABLE OF PRODUCING FREQUENT LIGHTNING STRIKES AND GUSTY WINDS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. FOR MORE INFORMATION...VISIT THE NATIONAL WEATHER SERVICE IN MIAMI WEBSITE AT WWW.WEATHER.GOV/MIAMI.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MIAMI FL 525 PM EDT MON JUL 30 2012 FLZ067-302200- INLAND PALM BEACH COUNTY FL 525 PM EDT MON JUL 30 2012 THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A * SIGNIFICANT WEATHER ADVISORY FOR... NORTH CENTRAL PALM BEACH COUNTY * UNTIL 600 PM EDT * AT 522 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM 7 MILES NORTHWEST OF NORTH COUNTY AIRPORT...AND MOVING VERY SLOWLY NORTHWEST. * THE STORM WILL AFFECT... RURAL NORTHERN PALM BEACH COUNTY AND SURROUNDING COMMUNITIES. THE MAIN IMPACT WILL BE FREQUENT TO EXCESSIVE LIGHTNING AND LOCALLY HEAVY RAIN WITH WIND GUSTS TO 40 MPH. LIGHTNING IS THE NUMBER ONE WEATHER RELATED KILLER IN FLORIDA. TREES AND OPEN SHELTERS OFFER NO PROTECTION. SEEK SHELTER IN A SAFE BUILDING UNTIL THE STORM PASSES. LAT...LON 2696 8042 2695 8024 2675 8027 2675 8035 TIME...MOT...LOC 2125Z 205DEG 10KT 2693 8030 JR
The Tampa radar (KTBW), 150 km away, was scanning. The volume nearest the first event began at 22:19 UTC.
1 hail. Local standard time, as filed.
The Glades County Emergency Manager reported one inch hail on Wayman Road near U.S. 27 west of Moore Haven.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2012Every state in 2012This day in weather historyWarnings in Florida, July 2012
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 397375.